Hose clamp



Feb. 14, w39y F. E. PAYNE: MRM? HosE CLAMP Filed Jan. 24 1938 PatentedFeb. 14, 1939 PATENT OFFICE HOSE. OLA`MP FrankE. Payne, Glencoe, Ill.,assignor to Crane Packing Company, Chicago, Ill., a corporation ofIllinois Application January 24, 1938, Serial No. 186,633

e claims.

This invention relates in general toa clamping device for fittings ofvarious kinds, particularly tubular fittings, for pipes'` of large andsmall diameter, and more particularly to a hose clamp A.. for tubularpipes of various sizes.

` An important object of the invention is in the provision of a readilyextensible and `variable clamp of this kind whichv may be quickly andeasily adjusted to fit pipes or` hose connections 1010i `differentsizes. n

A further object of the invention is in the provision of a clamp inwhich the clamping band adjustable to pipes of various sizes is doubledin thickness to provide an extremely strong and 151tight connection forpipes, hose connections, and

the like.

A still further object of the invention is in the provision of a hoseclamp having fittings adapt ed to provide for multiple layers of aclamping band superposed one over the other to provide a clamp of hightensile strength in which the clamping bands and fittings do not mar,dis` figure or dig into the hose or other structure to which they areapplied. l A still further object of the invention is in the provisionof a simple clamping structure which may be readily applied to multiplebands of various lengths, the ttings for opposite sides being similarand the actual attaching means comprising a simple nut and screw whichis easily and v`quickly applied by means of a screw driver or anysimilar pointed tool.

A still further object of the invention is in the provision of anencircling clamp or tting havingY multiple bands adjustable for articlesof different sizes in accordance with the structure as herein shown anddescribed.

In the accompanying drawing illustrating a preferred embodiment of theinvention, Fig. 1 is asectional view of a hoseconnection to which aclamp in accordance with this invention is applied;

Fig. 2 is an enlarged perspective of the clamping and attachmentfittings for a hose or tubular clamping Vband of this kind; Fig. 3 is aperspective of one of the clamping end fittings; Fig. 4 is a perspectiveof a fitting invented; and ,Y

Fig. 5 is a side elevation ofl a clamp of this kind illustrating themethod of application and determination of the length of` the band to beused for any particularinstallation.

In the ordinary hose clamps as now commonly used, sized Vbands areprovided withfa clamping 557. device and an underlying tongue whichbecomes embedded in the outer layers ofthe hose as it 'is more tightlyapplied over a metal connecting lFurthermore these hose clamps areprovided in fixed sizes which have very small variation so that theexact size must be obtained for each specific connection or the clamp isof no value.

The present invention overcomes these objec- 1o tions and diflicultiesby providing a pair of end ttings to which a flexible metal band isattached simply by bending it at the ends, by doubling the bent endsinwardly, and by making the clamp of one or more thicknesses, one overl5lying the other, depending upon the strength required. The metal bandemployed is usually of exible steel tape which is readily bendable, isnot easily broken, and if of suiicient width does not tend to damage thearticle to which it is ap- 2O plied. Y

Referring now more particularly to the drawing, a tubular fitting ofvthis type is shown as applied to a fabric or other hose 6 which isclamped upon or in engagement with a metal pipe or con- 25 nector 1. Theclamp comprises two end fittings 8 preferably identical in form and madeof stili metal having a perforated head 9 integrally attached to aperforated body I0 extending substantially at right angles thereto, aperforation 30 I I in the head being Unthreaded and of a size Vtoreceive and freely admit the threaded end I2 of a bolt or screw having aslotted head I3 for engagement of a screw driver. The body IB has arectangular perforation I4 with a mar- 35 ginal rim atthe edges and theextremity I5 remote from the head being preferably somewhat thinner,preferably rounded at the inner edge I6 and the opposite faces of thisend having recesses 20 and 2l about the width of the perforation I4 andthe tape inserted therethrough. The edge under the head 9 is alsoprovided with an undercut recess I9 to accommodate a second thickness ofa binding tape I'I applied thereto so there will be no bulging due tothe tape below the tting. The binding tape is preferably a flat steelstrip of cold rolled steel which is flexible but has great tensilestrength and is preferably of awidth to fit loosely Within the openingsI4 of the clamps.

In applying this clamping band to a hose or other structure, theextremities of the band may be looped aroundthe ends I5 of the fittingswith the overlapping portions turned inwardly a considerable distance sothere will be no tendency to slip or creep when tightened, and the endttings 8 placed together with the perforated heads 9 in position to beengaged by the screw I2. A fastening nut I8 is threaded on the end ofthe screw and drawn up against the head of one of the fittings 8 and isof a size such that when so drawn up the nut will be held againstrotation by its engagement with the angular body portion of the fittingextending from the head, thereby holding the nut' against rotation, sovthat Vthe screw head is easily engaged and threaded into the nut bymeans of a screw driver, thereby draw- I ing up the fittings and tightlyattaching the band around the hose or other article to which itisapplied.

Instead of applying a band of single thickness toany hose or otherarticle to be clamped, one end only of a length of fiexible tape islooped through the end of a fittingf as described, the band is passedentirely aro-und the article to be clamped, andthe free extremity of theband is inserted through the openingk I4 of the first end fitting asshown, the endl of the band is then drawn tightly over the first layeror thickness of the band` until, as shown in Fig. 5, the free extremityof thev band il makes a second complete turn of the article. The `bandis then cut ofi to the proper length, leaving a portion' Hav ofsufficient length to be looped through the opposite fitting 8 and turnedinwardly and under the adjacent eXtremity-thereof so that the heads ofthe fittings 8 will be adjacent each other, where they are connected andthe doubled band drawn up tightly by means of the nut and screwfastening device as before explained.

When the tapes are applied to the fittings, the ends are engaged by theupper and lower recesses 2B and 2l which seats the fittings, helps tekeep them in place and eliminates and bulging of the tape below thefitting. When the tape is doubled for clampinglthe undercut recess I9seats the tape so thatthe head end of the fitting is neither raised northe tape depressed beneath it.

With this clamp there is no Ypinching of the rubber hose or othermaterial to which it is applied and no deformingof' the tape under theVfittings, but there is auniform pressure toward the center all along thestrip or tape. With two buckles anda fastening bolt itis thus possibleeither to seal a one inch tubing or a twenty-two inch pipe merely byproviding astrip of the right length.

kThus a clamping band vof single or ldouble thickness is provided whichmay be readily applied and fastened tightly in` place in any place whereclamping devices of this kind may be used.

They are lparticularly applicable for making any tubular connectionssuch, as attaching a garden hose to a pipe fitting or coupling, inattaching a radiator hose for automobile connections, in providingagrounding joint for radio connections with metal pipes, and forattaching pipe coverings.l Although particularly described for use in. Yconnection with circular pipes or attachments it is also apparent that aclamping bandvrof this kind may be attached in single or doublevthicknesses about any suitable articles or materials.

I claim: 1. In a clamp comprising a free'strip of metal of sufficientlength to extend twice around an article, similar'riittings for each endof the strip, each fitting having an apertured end through Vwhich astrap en d is inserted andthe free end folded under toV forml a` loop,the metal strip in-V serted intermediateits ends through the apertureVtening screw means for clamping the head porl tions of the fittingstogether, and a metal strip having a loop at each end adapted to engagethe perforation of the body and the intermediate portion also extendingthrough the body perforation of one fitting to provide a doublethickness with one strand overlying the other and the underside of eachfitting having a recess of a depth to seat two thicknesses of the striptherein.

3. In a clamping band, a pair of end fittings each having an aperturedbody and a clamping head at an angle thereto, a metal strip to extendthrough one'body aperture and a loop at each end toengage one of thefittings, the strip thus lying in coils one over the other about anarticle to be clamped, the under-side of each fitting having a recess toseat two strips at one end and one strip at the other, and means fordrawing the clamping heads together.

"i, In a clamping band, a pair of end fittings each having a body with arectangular aperture and a clamping head at an angle thereto and anundercut recessthe Width of the aperture belowthickness and at the otherend two thicknesses of the strip, and clamping means to draw the headsof the fittings together.

5. In a circular clamp, a vpair of end fittings each having a body witha rectangular aperture and Ya clamping head at one end at an anglethereto, the opposite end of the body having a cross piece recessed attop and bottom with a rounded edge at the inner side of the aperture, ametal strip of a width to extend closely through the aperture and seatedin the recesses of the cross piece with a loop at each end to engageflatly against the roundedV edge of one of the fittings, and means toVdraw the clamping heads together to tighten the strip.

6. In a` circular clamp, a pair of end fittings each having a body withan aperture and a head extending at an angle at one end of the body, aclamping strip of a width to extend through the aperture and havingaloop at each end engaging the end of a fitting Yopposite the head, saiden d being recessed above and below to seat the loop of a clampingstrip, the heads being perforated,

a fastening screw inserted through the perforat tions of` oppositeheads, and a fastening nut threaded upon the screw and of a size to seatagainst one head with its side edge against the body of that fitting toprevent the nut from turning as the screwis turned.

-'7. A clamp comprising Va metal strip, a pair of end fittings, eachhaving an apertured body with a perforated head at an angle at one end,one endrof each end of the strip being inserted through the aperture ofthe body and turned reversely at the inside to, provide a loop engagingthe end of the body, the end of thebody being recessed at upper andlower sides thereof to seat the. said loop` and the lower side recessbeing deep enough to seat an additional thickness of the 8. In a clamp,a pair of ttings each having avperforated head with an apertured bodyextending at an angle therefrom, a flat metal strip of a width to t inthe aperture having a loop at the end to engage the end of the body, theunder face of the body having a recess at each end of its aperture of adepth to seat the strip therein 10 at one end and of a depth for aplurality of strips at the other end, and means to engage and draw theheads together. A

9. In a clamp according to claim 8, the ttin body aperture providing anopening for wrapping the strip more than one turn around an article tobe clamped, the end of the tting below the head having a recess at theend of the body to receive and seat the wrapped portion of the striponly therein.

FRANK E. PAYNE.

